Industry
Reports
| Report No. | IP10 (jot this number down to order) |
| Title | Asphalt Crack Sealing, the "ins" and the "outs" as well as the "whys, whens, hows, what with" and the "should I's" |
| Author(s) | |
| Publisher | Crafco, Inc.) |
| Pub. Date | January, 1991 |
| Pages | 16 |
| Keywords | |
| Description | Cracks in asphalt cement pavements are primarily caused by shrinkage. Asphalt cement pavements are made from approx. 94% sand and rock and 6% asphalt. Standard asphalt is very susceptible to the elements. Sun, wind, rain, and heat act to oxidize asphalt causing it to harden and shrink. When this happens the pavement breaks at its weakest point first. Joints along curb lines and cold paving joints are usually the first to go. Block cracking is also very common. The pavement cracks at regular intervals, usually transversely every 30 to 90 feet across the roadway. Other causes of asphalt cement cracks include a weak sub-base and vehicle traffic too heavy for the design of the pavement. In concrete pavements, joints are normally installed at the time of the initial construction. These joints are placed because concrete shrinks as it hardens. These joints must be sealed. If the joints are not installed or installed improperly, cracks will develop in the concrete as it dries, leading to potholes. |
| Postage | $
2.00 : U.S. $ 2.20 : Canada/Mexico $ 2.40 : Rest of the World |
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